hi ..iam giving bottle feeding to my son from 1st month ... when should I change bottle nipple? which type of nipple should I use next?

A. hi you should change the nipple after every 3 Months or when you find it cracked or discoloration in it. usually ,for the baby between 1 to 3 Months age ,one should use slow flow nipple which has two holes. but if your baby is 3 to 6 months old ,you should use the medium flow nipple that has three holes.